Sebastian, a renowned orchestra conductor, loses his son in a motorcycle accident for which his wife blames him, leading to the family's disintegration. With the intention to recover his daughter's affection, he takes her to Guanajuato, where he has a presentation. However, the unexpected encounter with a mortally wounded old man, who asks him for help to fulfill his last wish, will involve them in that mysterious murder, starting at that point a battle against their conscience and their own sur...